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dff8da6b | 1 | /* Copyright (C) 2002-2024 Free Software Foundation, Inc. |
76a50749 | 2 | This file is part of the GNU C Library. |
76a50749 UD |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
76a50749 UD |
17 | |
18 | #include "pthreadP.h" | |
c71ca1f8 | 19 | #include <string.h> |
48dbce60 | 20 | #include <pthread-offsets.h> |
63627246 | 21 | #include <shlib-compat.h> |
76a50749 | 22 | |
69854bb5 | 23 | static const struct pthread_rwlockattr default_rwlockattr = |
76a50749 UD |
24 | { |
25 | .lockkind = PTHREAD_RWLOCK_DEFAULT_NP, | |
26 | .pshared = PTHREAD_PROCESS_PRIVATE | |
27 | }; | |
28 | ||
29 | ||
cc25c8b4 | 30 | /* See pthread_rwlock_common.c. */ |
76a50749 | 31 | int |
63627246 | 32 | ___pthread_rwlock_init (pthread_rwlock_t *rwlock, |
f63f2bfd | 33 | const pthread_rwlockattr_t *attr) |
76a50749 | 34 | { |
72b3c6ee AZ |
35 | ASSERT_TYPE_SIZE (pthread_rwlock_t, __SIZEOF_PTHREAD_RWLOCK_T); |
36 | ||
48dbce60 AZ |
37 | /* The __flags is the only field where its offset should be checked to |
38 | avoid ABI breakage with static initializers. */ | |
39 | ASSERT_PTHREAD_INTERNAL_OFFSET (pthread_rwlock_t, __data.__flags, | |
40 | __PTHREAD_RWLOCK_FLAGS_OFFSET); | |
41 | ASSERT_PTHREAD_INTERNAL_MEMBER_SIZE (pthread_rwlock_t, __data.__flags, | |
42 | int); | |
43 | ||
76a50749 UD |
44 | const struct pthread_rwlockattr *iattr; |
45 | ||
69854bb5 | 46 | iattr = ((const struct pthread_rwlockattr *) attr) ?: &default_rwlockattr; |
76a50749 | 47 | |
f01c2359 | 48 | memset (rwlock, '\0', sizeof (*rwlock)); |
e59660bc | 49 | |
cc25c8b4 | 50 | rwlock->__data.__flags = iattr->lockkind; |
e59660bc | 51 | |
cc25c8b4 TR |
52 | /* The value of __SHARED in a private rwlock must be zero. */ |
53 | rwlock->__data.__shared = (iattr->pshared != PTHREAD_PROCESS_PRIVATE); | |
e59660bc | 54 | |
76a50749 UD |
55 | return 0; |
56 | } | |
63627246 FW |
57 | versioned_symbol (libc, ___pthread_rwlock_init, pthread_rwlock_init, |
58 | GLIBC_2_34); | |
59 | libc_hidden_ver (___pthread_rwlock_init, __pthread_rwlock_init) | |
60 | #ifndef SHARED | |
61 | strong_alias (___pthread_rwlock_init, __pthread_rwlock_init) | |
62 | #endif | |
63 | ||
64 | #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_1, GLIBC_2_34) | |
65 | compat_symbol (libpthread, ___pthread_rwlock_init, pthread_rwlock_init, | |
66 | GLIBC_2_1); | |
67 | #endif | |
68 | #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34) | |
69 | compat_symbol (libpthread, ___pthread_rwlock_init, __pthread_rwlock_init, | |
70 | GLIBC_2_2); | |
71 | #endif |